tonight michelle obama and her children rocked out at the kids' inaugural concert. the president will take the official oath of office tomorrow and festivities continue through monday. here's a preview. reporter: hundreds of thousands have packed the national mall on monday, eager to witness in person the second inauguration of president obama. but they're not quite partying like it's 2009. four years ago, record 1.8 million people gathered to see the swearing in of the first african-american president this year officials estimate 600,000 to 800,000 will be on hand. more than the crowds for george w. bush's inauguration but a far cry from 2009. there will still be star power, beyoncÉ and james taylor will take part in the ceremony. the mood on the mall will be different, and the president's speech likely to reflect that. like the nation is not teetering on the brink like it was in 2009, it's still struggling with high unemployment, and voters republic -- voters' lack of confidence in washington. >> we will have a good year if we make sound investments and as long a